android - What is the command to return to your main screen in an app? -

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how have app return 'home' screen when user on different class , click back/return button on phone?

right now, when access different class , hit button, goes home screen on droid rather home screen on app - how go home screen on app?

thanks!

use onbackpressed() method of activity class. make conditions : 

public void onbackpressed(){     if(conditon)   {     detailinfolist.setvisibility(view.visible);//or want show   } }

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